CN102686201A - Absorbent core with pattern of adhesive - Google Patents
Absorbent core with pattern of adhesive Download PDFInfo
- Publication number
- CN102686201A CN102686201A CN2010800586592A CN201080058659A CN102686201A CN 102686201 A CN102686201 A CN 102686201A CN 2010800586592 A CN2010800586592 A CN 2010800586592A CN 201080058659 A CN201080058659 A CN 201080058659A CN 102686201 A CN102686201 A CN 102686201A
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- CN
- China
- Prior art keywords
- layer
- absorbent cores
- auxiliary binder
- basal
- polymer particles
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
- A61F13/531—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having a homogeneous composition through the thickness of the pad
- A61F13/532—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having a homogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad
- A61F13/5323—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having a homogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad having absorbent material located in discrete regions, e.g. pockets
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
- A61F13/539—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium characterised by the connection of the absorbent layers with each other or with the outer layers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/15577—Apparatus or processes for manufacturing
- A61F13/15617—Making absorbent pads from fibres or pulverulent material with or without treatment of the fibres
- A61F13/1565—Making absorbent pads from fibres or pulverulent material with or without treatment of the fibres by depositing continuous layers of fibrous material between webs, e.g. wrapping layers of fibrous material
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/15577—Apparatus or processes for manufacturing
- A61F13/15617—Making absorbent pads from fibres or pulverulent material with or without treatment of the fibres
- A61F13/15658—Forming continuous, e.g. composite, fibrous webs, e.g. involving the application of pulverulent material on parts thereof
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/15577—Apparatus or processes for manufacturing
- A61F13/15804—Plant, e.g. involving several steps
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
- A61F13/47—Sanitary towels, incontinence pads or napkins
- A61F13/472—Sanitary towels, incontinence pads or napkins specially adapted for female use
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
- A61F2013/530481—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials
- A61F2013/53051—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials being only in particular parts or specially arranged
- A61F2013/530547—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials being only in particular parts or specially arranged positioned in a separate layer or layers
- A61F2013/530554—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials being only in particular parts or specially arranged positioned in a separate layer or layers and being fixed to a web
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
- A61F2013/530481—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials
- A61F2013/53051—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials being only in particular parts or specially arranged
- A61F2013/530547—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials being only in particular parts or specially arranged positioned in a separate layer or layers
- A61F2013/530562—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials being only in particular parts or specially arranged positioned in a separate layer or layers being arranged in discontinuous pattern
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
- A61F13/539—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium characterised by the connection of the absorbent layers with each other or with the outer layers
- A61F2013/53908—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium characterised by the connection of the absorbent layers with each other or with the outer layers with adhesive
- A61F2013/53925—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium characterised by the connection of the absorbent layers with each other or with the outer layers with adhesive with intermittent pattern, e.g. spots
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
- A61F13/539—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium characterised by the connection of the absorbent layers with each other or with the outer layers
- A61F2013/5395—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium characterised by the connection of the absorbent layers with each other or with the outer layers with thermoplastic agent, i.e. softened by heat
- A61F2013/53958—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium characterised by the connection of the absorbent layers with each other or with the outer layers with thermoplastic agent, i.e. softened by heat with separate adhesive layer
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24132—Structurally defined web or sheet [e.g., overall dimension, etc.] including grain, strips, or filamentary elements in different layers or components parallel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
- Y10T428/24893—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including particulate material
Abstract
An absorbent core comprising super absorbent polymer particles and a pattern of adhesive for use in disposable absorbent articles, for example for the absorption of menses or blood.
Description
Technical field
The present invention relates to be used for the absorbent cores of absorbent articles such as sanitary napkins etc.In addition, the invention still further relates to the method that is used to make said absorbent cores.
Background technology
Be used for absorb body fluids such as being known by people in this area, and comprise for example feminine hygiene article, such as sanitary towel, sanitary pad, tampon, interlabial devices and wound dressing etc. through the absorbent article of liquid or blood or vaginal secretions.When for example considering sanitary towel, these goods generally include as towards the liquid permeable topsheet of wearer's layer, as egative film and the absorbent cores between top flat and egative film towards the clothes layer.Body fluid sees through top flat and is gathered and be stored in the absorbent cores subsequently.The fluid wets wearer's that egative film prevents to be absorbed usually clothes.
Absorbent cores can comprise a kind of or more kinds of cellulosic absorbing material, and said cellulosic absorbing material can comprise natural fiber for example cellulose fibre (being generally wood pulp cellulose), synthetic fibers or their combination then.
This absorbent cores also can comprise the super absorbent polymer material, and said material often is tiny dispersive form, for example is particle form usually so that improve their absorption and retention characteristic.The super absorbent polymer material that is used for absorbent article comprises water-insoluble, water-swellable, as to form hydrogel crosslinked absorbable polymer usually, and said polymer can absorb a large amount of liquid and can under middle pressure, keep this type of absorbed liquid.Super absorbent polymer material (being also referred to as absorbent gelling material (AGM)) can be sneaked in the absorbent article by different modes, sneaks into usually in the cored structure; For example, absorbent gelling material of a granular form can be dispersed in the fibrolaminar fiber included in the core, or more properly says with more spissated layout and be confined between each fibrous layer.
The absorbent cores that is used for absorbent article with thin structure also can be improved the fixation of absorbent gelling material, especially when goods have loaded liquid wholly or in part, and can strengthen snugness of fit.This type of thin structure provides and has better comfort level, invisible and adaptive absorbent article concurrently.This type of absorbent cores can for example comprise the fibrous material of very small amount or fibre not.
In this type of core, need fixing said super absorbent polymer material usually.This can be for example through using thermoplastic adhesives to realize; Said thermoplastic adhesives can apply by the form of microfibre so that snarl the super absorbent polymer material usually; As usually about diaper disclosed, as patent application EP for example 1447067 is disclosed.
Form with diaper and correlatedly to be, feminine hygiene article is intended to absorb through liquid but not urine, or except urine, also absorbs through liquid.Since through liquid for example surface tension or mobile aspect be different from urine, therefore hope further to improve the collection and/or the absorption characteristic of the absorbent cores that is intended to be used for feminine hygiene article.Also possibly hope to improve the integrity of absorbent cores.
Summary of the invention
The present invention relates to be used for the absorbent cores of absorbent articles such as sanitary napkins.This absorbent cores has longitudinal axis and axis of pitch, and comprise cover layer with first surface and second surface, the first auxiliary binder layer on the second surface that is deposited on cap rock, have first surface and second surface basal layer, comprise superabsorbent polymer particles layer and thermoplastic adhesive layer's absorbed layer.
The superabsorbent polymer particles layer is comprised between the first surface of tectal second surface and basal layer, and the thermoplastic adhesive layer covers the superabsorbent polymer particles layer on the first surface of basal layer;
The first auxiliary binder layer deposits to cover less than 50% and greater than 15% with pattern.
The invention still further relates to the method that is used to make absorbent cores, said method comprising the steps of:
A) cover layer with first surface and second surface is provided, and first auxiliary binder is deposited upon on the tectal second surface;
Wherein the first auxiliary binder layer with pattern deposition to cover, preferably less than 35% and greater than the surface area of 25% tectal second surface less than 50% and greater than 15%;
B) basal layer with first surface and second surface is provided;
C) the second auxiliary binder layer randomly is provided on the first surface of basal layer;
D) on the first surface that the superabsorbent polymer particles layer is set to basal layer and the second optional auxiliary binder layer;
E) thermoplastic adhesive layer is deposited on superabsorbent polymer particles layer and the basal layer with the super absorbent polymer material layer on the first surface that covers basal layer;
F) the assembling absorbent cores inserts and puts between tectal second surface and the thermoplastic adhesive layer auxiliary binder layer of winning.
Description of drawings
Fig. 1 shows the top view of an embodiment of absorbent article.
Fig. 2 shows the cross-sectional view of an embodiment of absorbent cores as herein described.
The specific embodiment
The definition of term
This paper " absorbent article " is meant the goods that comprise the absorbent cores that is described below.In general, absorbent article can absorb and store the effluent that health is discharged.
The terms take-up goods generally are meant to be close to or contiguous wearer's body is placed to absorb and to hold the goods of the effluent of discharging from health.
Typical absorbent articles can be sanitary towel, sanitary pad, tampon, interlabial devices, wound dressing, adult incontinence product, diaper etc., and they are intended to be used for absorb body fluids such as through liquid or blood or vaginal secretions or urine.
According to typical absorbent articles of the present invention is feminine hygiene products such as sanitary towel, sanitary pad and interlabial devices.
Usually these absorbent articles are disposable.
This paper uses a technical term, and to describe the goods that are not intended to be washed or in other words to preserve once more or reuse as goods (be that they are intended to promptly be dropped after single uses " disposable "; And possibly be recovered, compost treatment, or in other words to handle with the mode of environmentally compatible).
" absorbent cores " be meant absorbent article like lower member, said member is intended to absorb and stores the effluent of discharging from health such as through liquid.Absorbent cores according to the present invention comprises absorbing material, cover layer, basal layer, thermoplastic adhesives and auxiliary binder at least.
" absorbing material " is meant liquid absorption material, such as super absorbent polymer material, fiber, foam and their mixture, the for example mixture of super absorbent polymer material and fiber.The super absorbent polymer material also can be called as AGM (absorbent gelling material) in this article.Usually, AGM is provided with the form of superabsorbent polymer particles, and it also can be called as " AGM granule " in this article.
The fiber that supatex fabric is meant orientation or arbitrary orientation is through friction and/or bonding and/or bond, or pass through wet grinding and the Art Ross net of felting; Do not comprise paper with through yarn or the continuous yarn product weaving, weave, bunch become, loop bonding merges constraint, do not consider whether stitched in addition.Said fiber can be natural or synthetical.But they can be short fiber or continuous filament yarn or original position and form.Term " supatex fabric " and " non-woven webs " interchangeable use.Basis weight of nonwoven fabrics is usually with gram/square metre (g/m
2) expression and can measure according to EDANA method 40.3-90.In general, supatex fabric can comprise fiber (natural fiber), staple fibre (synthetic fibers) or their combination of natural generation.The natural fiber instance includes but not limited to: animal fiber is Pilus Caprae seu Ovis, silk, fur and hair for example; The Plant fiber is cellulose, Cotton Gossypii, Caulis et Folium Lini, linen and Fructus Cannabis for example; With some naturally occurring mineral fibres.
As used herein, " thermoplastic adhesives " are meant the binding agent that in absorbent cores, is used for fixing absorbing material.Usually, thermoplastic adhesives can apply by the form of microfibre to snarl absorbing material.Thermoplastic adhesives (being generally the microfibre binding agent) can be the thermoplasticity hot-melt adhesive.The binding agent that the term hot hot-melt adhesive is meant that melt applies and when solidifying, obtains intensity (is seen " Adhesion and Adhesives Technology:An Introduction "; Compile and edit (Hanser publishers Munich, 1997) by Alphonsus V.Pocius.
" auxiliary binder " is meant following binding agent, and said binding agent is used for the basal layer of absorbent cores or cover layer be connected to and comprises the particulate layer of AGM.
Comprise that the absorbent article according to absorbent cores of the present invention can be for example sanitary towel or sanitary pad.
Absorbent article
Typical absorbent articles comprise top flat 30, egative film 40 and be interposed in top flat 30 and egative film 40 between absorbent cores.
Usually, when absorbent article is worn, top flat 30 towards wearer and egative film 40 towards clothes.When absorbent article was worn, top flat 30 can at least partly contact wearer's skin.
Fig. 1 shows an embodiment of the absorbent article that comprises absorbent cores as herein described, and said absorbent article is a sanitary towel 20.Usually, sanitary towel 20 comprises following element: the top flat 30 of fluid permeable, egative film 40 and be interposed in top flat 30 and egative film 40 between absorbent cores 28.In order to show the fabric of absorbent article 20, top flat 30 be shown as the part excision to show absorbent cores 28.In typical embodiment, absorbent cores 28 comprises cover layer 130, basal layer 100, absorbed layer, and said absorbed layer comprises superabsorbent polymer particles or (for ease of censuring) AGM granular layer 110 and thermoplastic adhesive layer 120.In addition, absorbent cores 28 also comprises the auxiliary binder layer such as the first auxiliary binder layer 121, and it is indicated as the bar paten below the cover layer 130 as an exemplary.In Fig. 1, cover layer 130, together with the bar of the first auxiliary binder layer 121, be shown as part excision to show following thermoplastic adhesive layer 120.
In Fig. 2, an embodiment of absorbent cores 28 has been shown with cross-sectional view.Absorbent cores 28 comprises basal layer 100, comprise AGM granular layer 110 and thermoplastic adhesive layer's 120 absorbed layer, can be configured to the first auxiliary binder layer 121 and the cover layer 130 of bar paten for example or dot pattern.
Top flat
This absorbent article can comprise the top flat 30 of fluid permeable.Suitable top flat can be to be weaved or supatex fabric and/or the three-dimensional network processed by the polymeric film of the liquid non-permeate that comprises the permeable hole of liquid.For example, towards and contact wearer's surface can provide by thin-film material with aperture, said aperture be used for promoting liquid from towards wearer's surface towards the transmission of absorbing structure.The permeable perforated film of this class I liquid I provides the three-dimensional fiber shape structure of resilience force.This type of thin film for example has been disclosed among US 3929135, US 4151240, US 4319868, US 4324426, US 4343314, US4591523, US 4609518, US 4629643, US 4695422 or the WO 96/00548 in detail.
Top flat can be simple layer maybe can comprise a plurality of layers.
Absorbent cores
Absorbent cores 28 generally have two sides promptly first side and second side, along the length of x axis (longitudinal axis), along y axis (axis of pitch) usually less than the width of length and along the height less than width of z axis.
Absorbent cores 28 can have rectangular shape, or can have curved edge as the said core of other a kind of selection.For example, said core can have ellipse or hourglass shape.
In a typical embodiment of absorbent cores 28 as herein described, when absorbent article is worn, absorbent cores 28 be oriented to make its first side towards wearer and its second side towards wearer's clothes.In this embodiment, first side also can be called as towards bodyside, and second side also can be called as towards garment side.
The surface of included first lateral each layer or material towards absorbent cores 28 will be named as the first surface of equivalent layer in the absorbent cores 28, will be named as second surface towards the second lateral surface of absorbent cores 28.
The first auxiliary binder layer 121 on the second surface that absorbent cores 28 comprises cover layer 130 with first surface and second surface, be deposited on cover layer 130, have the basal layer 100 of first surface and second surface, be the super absorbent polymer material layer (AGM) and the thermoplastic adhesive layer 120 of superabsorbent polymer particles (AGM granule) 110 forms usually.Randomly, absorbent cores 28 comprises the second auxiliary binder layer on the first surface that is deposited on basal layer 100.
Superabsorbent polymer particles 110 and thermoplastic adhesives 120 are comprised between the first surface of second surface and basal layer 100 of cover layer 130.
In order to describe the typical structure of absorbent cores 28, AGM granule 110, thermoplastic adhesives 120 and first auxiliary binder 121 and optional tired in this article " layer " that has first surface and second surface respectively that be called of second auxiliary binder.Yet these layers can be discontinuous, for example the first auxiliary binder layer 121 or AGM granular layer 110.So-called " discontinuity layer " is meant that said layer can comprise the open area, and said open area is substantially free of the material of said layer 110 self.
Thermoplastic adhesive layer 120 can be collectively referred to as absorbed layer with AGM granular layer 110, and said absorbed layer also comprises first surface and second surface then.
Thermoplastic adhesive layer 120 can provide by the form of microfibre.
Cover layer
The second surface of cover layer 130 can at least partly contact the first auxiliary binder layer 121.Institute is more detailed like hereinafter, and the first auxiliary binder layer 121 applies by pattern form usually.Therefore, but the also first surface of part absorbing contacting layer of tectal second surface.For example, the second surface of cover layer 130 can contact the first surface of the pattern of the first auxiliary binder layer 121, and the also first surface of contacting thermoplastic adhesive phase 120.
The exemplary materials that is used for cover layer 130 can be provided by non-woven material, comprises synthetic fibers, such as polyethylene (PE), PET (PET), polypropylene (PP).Because it is hydrophobic being used for the person's character of the polymer of non-woven material production, thereby can they be applied with hydrophilic coating usually, for example apply so that the non-woven material of permanent hydrophilic to be provided with durable hydrophilic coatings.Other non-woven material of the cover layer 130 that is used to choose wantonly can comprise composite construction, such as so-called SMS material, comprises spunbond layer, meltblown layer and another spunbond layer.The material of cover layer 130 also can comprise cellulose or cellulose-derived fiber, is generally by weight 50% to 95%, or by weight 60% to 80%, for example 70% cellulose or cellulose-derived fiber by weight.
The basic weight of the material of cover layer 130 usually can be at 5g/m
2To 80g/m
2, or 10g/m
2To 60g/m
2, or 20g/m
2To 40g/m
2Scope in.
Auxiliary binder
As mentioned below, thermoplastic adhesives 120 are used for fixing AGM granule 110.Yet because AGM granule 110 is tending towards swelling when absorbing liquid, thermoplastic adhesives 120 should not apply strong restraint force to the AGM granule, but should be flexible and ductile so that be adapted to particulate swelling.
Usually, thermoplastic adhesives 120 can deposit at least partly to cover and to snarl AGM granule 110 so that fix them in drying regime and in wetting state by the microfibre form.Said micro-fiber structure still is favourable, because microfibre can expand in response to the swelling of AGM granule 110 and can not rupture usually, this has improved wet fixation.
Yet for example because their width is less, this type of microfibre possibly not provide enough adhesion strength to adhere to basal layer 100 and/or cover layer 130 securely, and this can cause the integrity of absorbent cores to be lower than desired situation.Simultaneously, more substantial thermoplastic adhesives 120 (being generally microfibre) are provided so that improve the fluid treatment capacity that the integrity of absorbent cores may be harmful to absorbent cores slightly, especially all the more so such as through liquid or blood the time when relating to complex fluid.
In order to improve the integrity of absorbent cores 28; Simultaneously the fluid treatment capacity of holding core such as to body fluid such as collection and/or absorptive capacity through liquid; Can will comprise advantageously therefore that the absorbed layer of thermoplastic adhesive layer 120 and AGM granular layer 110 adheres to cover layer 130, and randomly adhere to basal layer 100.This can realize that said additional binder will be called as auxiliary binder in this article through using additional binder.The first auxiliary binder layer 121 can be applied on the cover layer 130.The optional second auxiliary binder layer can be applied on the basal layer.Therefore, first auxiliary binder 121 and the second optional auxiliary binder can be used as the bridge between cover layer 130 (and randomly basal layer 100) and the absorbed layer.
Therefore can select and apply first auxiliary binder with the second optional auxiliary binder so as to adhere to adjacent layer and/or material on, and need not also to be suitable for adapting to the swelling of AGM granule 110.For example, first auxiliary binder 121 need not to apply with the form of microfibre.
In the typical embodiment of absorbent cores 28, fluid must at first pass the cover layer 130 of absorbent cores 28 before they can be absorbed by following absorbed layer.Yet, especially for when comparing, tend to be more heavy-gravity with urine and have usually higher capillary through liquid, the applying of first auxiliary binder 121 may block these fluidic through and therefore cause the increase of acquisition time.
Found to pass cover layer 130 more quickly and get in the absorbent cores 28 through liquid in order to allow, first auxiliary binder 121 that is applied on the second surface of cover layer 130 advantageously applies by certain pattern.
" pattern " of this paper is meant the discontinuity layer of first auxiliary binder 121; Said discontinuity layer is arranged such that some zones of the second surface of cover layer 130 are covered by first auxiliary binder 121, and other zones are not covered by first auxiliary binder 121.
Therefore, the part of the surface area of the second surface of cover layer 130 can be capped first auxiliary binder 121 usually.
The first auxiliary binder layer 121 can for example be pressed bar paten or dot pattern deposition.These can be bending or straight basically.In some embodiments, the first auxiliary binder layer 121 can be by crossing bar or non-crossing bar deposition.For example, as shown in Figure 1, the first auxiliary binder layer 121 can deposit by bar paten, and said longitudinal axis that is arranged essentially parallel to absorbent cores 28 extends.
In order to pass cover layer 130 at fluid and to improve and realize balance between the integrity, the first auxiliary binder layer 121 with the pattern deposition make cover layer 130 second surface surface area less than 50% and being covered by the first auxiliary binder layer 121 of the surface area of the second surface of cover layer 130 greater than 15%.Preferably, the 25-35% of the surface area of the second surface of cover layer 130 for example 33% can be covered by the first auxiliary binder layer 121.
Said therein pattern comprises that in the embodiment of bar, these can have 0.5-3mm, or 0.7-1.3mm, for example the width of 1mm.In addition, these 1-5mm that also can be spaced apart from each other, or 2-4mm, for example 3mm.
The first surface of the first auxiliary binder layer 121 can at least partly contact the second surface of cover layer 130, and the second surface of the first auxiliary binder layer 121 first surface of part absorbing contacting layer at least.
In addition, the second surface of the first auxiliary binder layer 121 first surface of part contacting thermoplastic adhesive phase 120 at least also.
First auxiliary binder 121 that is present in the absorbent cores 28 can have 4g/m
2To 11g/m
2, or 7g/m
2To 9g/m
2, 8g/m for example
2Overall basic weight.
Randomly, absorbent cores 28 can additionally comprise the second auxiliary binder layer on the first surface that is deposited on basal layer 100.The second auxiliary binder layer can be deposited as discontinuity layer, promptly is deposited as about first auxiliary binder, 121 described arbitrary patterns and successive basically layer.The second auxiliary binder layer can for example apply through spraying.The second auxiliary binder layer can be successive.
In this type of embodiment, at least a portion of the surface area of the first surface of basal layer 100 can be covered by the second auxiliary binder layer.
The second auxiliary binder layer can be deposited as make basal layer 100 first surface surface area at least 70%, perhaps 80% to 95% covered by the second auxiliary binder layer.
Typical adhesive material as auxiliary binder can be for example construction adhesive.A kind of typical adhesive material as first auxiliary binder 121 and second auxiliary binder of choosing wantonly can have for example 2500cP to 3800cP; Or 2800cP to 3200cP; For example the cloth network of 2950cP restrains Field viscosity, and said viscosity is measured according to method of testing ASTM D 3236/88 spindle 27.5 with 30rpm under 149 ℃.A kind of typical adhesive material as first auxiliary binder and optional second auxiliary binder also can have 80 ℃ to 100 ℃, perhaps 86 ℃ to 91 ℃ ring and ball softening point, and said softening point is measured according to method of testing ASTM E-28-99.A kind of suitable Bostik H4265 of auxiliary binder for for example providing by BostikNetherlands.
Usually, the ring and ball softening point of first auxiliary binder and optional second auxiliary binder can be lower than the ring and ball softening point of thermoplastic adhesives, and said softening point is all measured under the same conditions.
In a simplified embodiment, the described adhesive material that is used as first auxiliary binder and second auxiliary binder of choosing wantonly also can be used for thermoplastic adhesive layer 120.Yet in this embodiment, thermoplastic adhesive layer 120 provides by the microfibre form.
Absorbed layer
Absorbed layer comprises superabsorbent polymer particles (AGM granule) layer 110 and thermoplastic adhesive layer 120.AGM granular layer 110 can be conforming layer or heterosphere, wherein so-called " evenly " or " non-homogeneous ", is meant that AGM granule 110 can be by even or non-homogeneous basis weight profile on basal layer 100.
According to the present invention, AGM granular layer 110 can be discontinuity layer.So-called " discontinuity layer " is meant that said layer can comprise the open area, and said open area is substantially free of the super absorbent polymer material.For example, AGM granular layer 110 can comprise opening, can be comprised the open area that the zone centered on of AGM granule 110.These openings have less than 10mm or less than 5mm or 3mm or 2mm or 1.5mm and greater than diameter or the maximum span of 0.5mm or 1mm usually.As other a kind of selection, absorbed layer can comprise the zone with AGM granule 110, and said zone is centered on by the open area.In certain embodiments, comprise that the zone of AGM granule 110 can be zone of dispersion, said zone of dispersion has less than 10mm, or less than 5mm, or 3mm, or 2mm, or 1.5mm and greater than 0.5mm, or the diameter of 1mm or maximum span.
When AGM granular layer 110 being provided as heterosphere (for example being provided as discontinuity layer usually), at least some parts of the first surface of basal layer 100 can not covered by AGM granule 110.
Thermoplastic adhesive layer 120 is used for partial fixing AGM granule 110 at least.Usually, thermoplastic adhesive layer 120 can provide such as microfibre by the form of fiber.
In the embodiment of the discontinuity layer that comprises AGM granule 110, thermoplastic adhesive layer 120 can at least partly contact AGM granular layer 110 and also at least partly contact basal layer 100.
For example; When on the first surface that thermoplastic adhesive layer 120 is applied to AGM granular layer 110; Thermoplastic adhesive layer's second surface part at least contacts the first surface of AGM granular layer 110, and at least partly contacts the first surface of basal layer 100, and is as shown in Figure 2.In other words, thermoplastic adhesive layer 120 second surface can contact the first surface of basal layer 100 in some part, and said part is corresponding to the opening of the discontinuity layer of AGM granule 110.Usually, thermoplastic adhesive layer 120 can contact basal layer 100 through the second optional auxiliary binder layer.
Usually, thermoplastic adhesive layer 120 can rise and fall between the first surface of the first surface of AGM granular layer 110 and basal layer 100.Wherein thermoplastic adhesive layer 120 is called as engaging zones with the zone that basal layer 100 contacts.
The appropriate section of hereinafter has further described exemplary typical heat plastic binder 120 and typical superabsorbent polymer particles 110.
Basal layer
In typical embodiment, basal layer 100 can at least partly contact AGM granular layer 110.For example, the second surface of AGM granular layer 110 can at least partly contact the first surface of basal layer 100.
The exemplary materials that is used for basal layer 100 can comprise the non-woven material that contains synthetic fibers or natural fiber or their mixture; Carded nonwoven for example; Or more typically comprise synthetic fibers and the natural fiber for example air lay of cellulose fibre or the fibrous material of wet-laying, for example the air lay fibrous material of latex or hot adhesion.
For example; Basal layer 100 can comprise the fibrous material that contains cellulose or cellulose-derived fiber; Common for example about by weight 40% to about 100% cellulose or cellulose-derived fiber; Or about by weight 50% to about 95% cellulose or cellulose-derived fiber, perhaps about by weight 60% to about 90% cellulose or cellulose-derived fiber.
The basal layer 100 that comprises the cellulose fibre of basic percentage ratio can provide following advantage: the liquid fraction generation liquid that absorbed layer absorbed is immediately distributed.
The basic weight of the material of basal layer 100 usually can be at about 10g/m
2To about 120g/m
2, or about 40g/m
2To about 100g/m
2, or about 50g/m
2To about 80g/m
2Scope in.
Thermoplastic adhesives
The thermoplastic adhesives 120 that are present in the absorbed layer can have 11g/m
2To 3g/m
2, preferred 9g/m
2To 5g/m
2, 8g/m for example
2, or 6g/m
2Basic weight.
Usually, thermoplastic adhesive layer 120 can apply by the form of microfibre to snarl absorbing material such as superabsorbent polymer particles 110.For example, said microfibre can have 1 μ m to 100 μ m, or the average thickness of 25 μ m to 75 μ m.
Do not accept the constraint of opinion, the table of discovery hot-melt adhesive material that reveals the excellent bonds performance can be used as thermoplastic adhesives 120.Good cohesion guarantees that binding agent can not rupture, and especially in response to external force, promptly ruptures in response to strain.When the absorption product had been gathered liquid, said liquid was stored in the AGM granule 110 subsequently, and said AGM granule thereby swelling make thermoplastic adhesives 120 stand the external force effect.A kind of exemplary hot plastic binder 120 should allow this type of swelling takes place and can not produce fracture, also can not give too much compression stress, and said compression stress can suppress the swelling of AGM granule 110.Possibly expect that thermoplastic adhesives 120 do not rupture, the wet fixation of said fracture meeting deterioration AGM granule 110.Exemplary appropriate thermal hot melt adhesive material can be those described in the patent application EP1447067 that has mentioned, especially [0052] to [0063] joint described those.
Specifically, typically can meet one or more or whole in the parameter in the appropriate section [0058] to [0061] of above-mentioned patent application EP 1447067 as the adhesive material of thermoplastic adhesives.In addition or as other a kind of selection, thermoplastic adhesives also can meet one or more or whole in the following parameter, i.e. bonding strength parameter γ, cloth network gram Field viscosity and ring and ball softening point.
For example, thermoplastic adhesives 120 can have enough bonding strength parameter γ.Bonding strength parameter γ uses the alleged rheology creep of hereinafter to test and measures.Enough low bonding strength parameter γ representes elastic adhesive, and this elastic adhesive for example can stretch and can not tear.If apply the stress of τ=1000Pa, then bonding strength parameter γ can be less than 100%, less than 90%, or less than 75%.For the stress of τ=125000Pa, bonding strength parameter γ can be less than 1200%, less than 1000%, or less than 800%.
Typical adhesive material as thermoplastic adhesives also can have 2100cP to 2800cP, and for example the cloth network of 2500cP restrains Field viscosity, and said viscosity is measured according to method of testing ASTM 12-3236/88 spindle 27.5 with 30rpm under 149 ℃.
For example, the cloth network of thermoplastic adhesives 120 gram Field viscosity can be lower than the cloth network gram Field viscosity of first auxiliary binder 121 and second auxiliary binder of choosing wantonly.
Typical adhesive material as thermoplastic adhesives also can have 2100cP to 2800cP, and for example the cloth network of 2500cP restrains Field viscosity, and said viscosity is measured according to method of testing ASTM 12-3236/88 spindle 27.5 with 30rpm under 149 ℃.
Superabsorbent polymer particles (AGM granule)
Usually, the AGM granular layer can be made up of 100% superabsorbent polymer particles 110 by weight.
As other a kind of selection, AGM granule 110 also can randomly mix with fibrous material, and said fibrous material can be provided for further the fixedly particulate substrate of AGM.Yet, can use the fibrous material of low amount usually, for example less than about 40 weight % of the particulate gross weight of AGM, less than about 20 weight %, or less than about 10 weight %.
The AGM granule 110 that is comprised in the absorbed layer generally includes polymer beads water-insoluble basically, water-swellable, and said polymer beads also can be porous.
According to an embodiment, porous AGM granule 110 is optional from polyacrylate and Polyacrylate based materials, for example the neutral Acusol772 Acusol771 of part.
In one embodiment, the AGM granular layer 110 in the absorbent cores 28 is present in by following average basis weight in the zone of whole absorbent cores 28, and said average basis weight is less than about 250g/m
2, or less than about 220g/m
2, or about 60g/m
2To about 180g/m
2, or about 100g/m
2To about 160g/m
2Also can use about at the most 300g/m of AGM granular layer 110
2, or about at the most 400g/m
2, or about at the most 500g/m
2Average basis weight.Average basis weight is calculated by the whole area of using the zone usually, promptly obtains through AGM granular layer 110, and comprises that therefore possible opening, said opening for example are included in the discontinuity layer.Usually, by the weight of absorbent cores 28, the AGM granule can constitute at least about 45%, or at least about 50%, or at least about 55%.
AGM granule 110 can have through about 200 μ m of selecting to about 600 μ m usually, or about 300 μ m are to the particle mean size of about 500 μ m.
The particulate particle mean size of AGM can for example be measured through the dry screen analytic process like mensuration known in the art.Also can use like optical means based on light scattering and image analysis technology.
According to an embodiment, AGM granule 110 can be selected from the polyacrylate based polyalcohol described in the PCT patent application WO 07/047598, and said polymer is few crosslinked or not crosslinked basically Polyacrylate based materials.Specifically; Said Polyacrylate based materials can have by weight at least about 30%, by weight between between about 30% and about 80%, or the extracted fraction between about 32% and about 70% by weight, the said fraction that extracts is that " extractable " method of testing described in the patent application of quoting according to preceding text is evaluated and tested.As other a kind of selection; Said Polyacrylate based materials can have at least about 30g/g, at least about 35g/g or at least about the reserve capacity of 40g/g, and said reserve capacity is that " centrifugal reserve capacity " test described in the patent application of quoting according to preceding text is evaluated and tested.AGM granule 110 also can be selected from the polyacrylate based polyalcohol described in the PCT patent application WO 07/046052.In fact said polymer at sorption complex liquid such as through especially effective aspect liquid or the blood; And when absorbing this type of fluid, generally do not demonstrate tangible swelling and gel blockage subsequently (as traditional superabsorbents); But play a part the thickening agent of body fluid to a certain extent; Be certain gelatinous material thereby in absorbing structure, for example in the gap of fiber, be fixed, and do not cause the essence swelling also to cause the realizable increase of the general thickness of absorbent cores then.28 said polymer can provide with porous absorbent polymer particles form according to known method.
The AGM granule that is used for absorbent cores can have with the particulate saline flow conductivity of AGM represent greater than 10,20,30 or the permeability of 40SFC unit, wherein 1SFC unit is 1 * 10
-7(cm
3* s)/g.The saline flow conductivity is art-recognized parameter, and is to measure according to the test of announcing among the EP 752892B.
In certain embodiments, above-mentioned absorbent cores 28 can constitute the absorber element in the absorbent article fully, or available extra play replenishes.For example, can the cellulosic acquisition layer be deposited between absorbent cores 28 and the top flat 30.According to an embodiment; Acquisition layer can for example comprise the cellulosic non-woven material of processing through air lay or wet-laying synthetic fibers such as polyethylene (PE), PET (PET) or polypropylene (PP), is similar to the situation of the cover layer 130 of absorbent cores 28 of the present invention.
The exemplary materials that is used for fluid acquisition layer can comprise the non-woven material of spunbond or carding, or airlaid material for example latex is agglutinating or the airlaid material of hot adhesion.Basic weight usually can be at about 10g/m
2To about 60g/m
2, or about 25g/m
2To about 40g/m
2Scope in.
According to another alternative embodiment, absorbent article can comprise another fibrous layer, and said fibrous layer is comprised between absorbent cores 28 and the egative film 40, that is, be arranged on usually core on garment surface.Layer that should be optional can be by providing with basal layer 100 described those the similar fibrous materials that are directed against absorbent cores of the present invention.28 according to this another embodiment, and said optional fibrous layer can be used as the wicking layer of interpolation, and said wicking layer is admitted and distributed and possibly not be absorbed the excess fluid that core 28 keeps fully.
Usually the other materials that also can be particle form can be included in the absorbent cores 28, and said material for example is known odour controlling materials or the inert material such as silicon dioxide.
Egative film
This absorbent article also can comprise egative film 40.Egative film can 40 be used for preventing being absorbed and being contained in material such as underwear, trousers, nightwear, underwear and shirt or the jacket of the fluid wets absorbing contacting goods of absorbing structure, thereby can be used as the barrier that convection cell transmits.Egative film 40 also can allow at least water vapour or water vapour and air to see through it.
Especially when absorbent article can be used as sanitary towel or sanitary pad, said absorbent article also can have the underpants for women buckling clamping part, and said buckling clamping part provides the mode that goods is connected to underwear, for example the lip-deep underpants for women cement towards clothes of egative film.The flap or the flank that center on the crotch portion edge fold of underwear also can be provided on the side of diaper.
Be used to make the method for absorbent cores with anti-strain core covering
Use description to make the method for absorbent cores 28 as herein described now.
Steps A)
Cover layer with first surface and second surface is provided, and first auxiliary binder is deposited upon on the tectal second surface.The first auxiliary binder layer with pattern deposition make tectal second surface surface area less than 50% and being covered by the first auxiliary binder layer of the surface area of tectal second surface greater than 15%.Usually, the surface area of tectal second surface less than 35% and greater than 25%, can be covered by the first auxiliary binder layer such as 33%.
In certain embodiments, the first auxiliary binder layer is pressed the bar paten deposition, and said has 0.5-3mm, or 0.7-1.3mm, for example the width of 1mm.In addition, these 1-5mm that also can be spaced apart from each other, or 2-4mm, for example 3mm.
Step B)
Basal layer with first surface and second surface is provided.
Basal layer can for example be provided such as mixing by successive material source.
Step C) (optional)
The second auxiliary binder layer randomly is provided, and it is deposited on the first surface of basal layer.For example, can second auxiliary binder be deposited on the first surface of basal layer through spraying.
Step D)
The superabsorbent polymer particles layer is provided, and it is deposited on the first surface of basal layer.As pointing out, the first surface of basal layer can be randomly pretreated with second auxiliary binder.
Step e)
The thermoplastic adhesive layer is deposited on superabsorbent polymer particles layer and the basal layer with the superabsorbent polymer particles layer on the first surface that covers basal layer;
Step F)
The assembling absorbent cores is interposed between tectal second surface and the thermoplastic adhesive layer auxiliary binder layer of winning.
Method of testing
Rheology creep test
Described in the EP 1447067 that is used to measure the rheology creep test of bonding strength parameter γ as transfer Procter&Gamble Company mentioned above.
Dimension disclosed herein is not intended to be understood that strictly to be limited to described exact value with value.On the contrary, except as otherwise noted, each such dimension is meant the numerical value of being quoted and centers on the scope that is equal on the function of this numerical value.For example, the dimension that is disclosed as " 40mm " is intended to expression " about 40mm ".
Claims (15)
1. an absorbent cores (28), said absorbent cores has longitudinal axis and axis of pitch;
The first auxiliary binder layer (121) on the second surface that said absorbent cores (28) comprises cover layer (130) with first surface and second surface, be deposited on said cover layer (130), have first surface and second surface basal layer (100), comprise superabsorbent polymer particles layer (110) and thermoplastic adhesive layer's (120) absorbed layer;
Wherein said superabsorbent polymer particles layer (110) is comprised between the first surface of second surface and said basal layer (100) of said cover layer (130);
Wherein said thermoplastic adhesive layer (120) covers the superabsorbent polymer particles layer (110) on the first surface of said basal layer (100);
And wherein said first auxiliary binder (121) with pattern deposition to cover, preferably less than 35% and greater than the surface area of the second surface of 25% said cover layer (130) less than 50% and greater than 15%.
2. absorbent cores as claimed in claim 1 (28), the wherein said first auxiliary binder layer (121) are pressed the bar paten deposition, and said has 0.5-3mm, the width of preferred 0.7-1.3mm.
3. according to claim 1 or claim 2 absorbent cores (28), the wherein said first auxiliary binder layer (121) is pressed the bar paten deposition, said quilt 1-5mm that is spaced apart from each other, preferred 2-4mm.
4. like the described absorbent cores of each aforementioned claim (28), the wherein said first auxiliary binder layer (121) is pressed the bar paten deposition, and wherein said be parallel, preferably said longitudinal axis that is parallel to said absorbent cores (28).
5. like the described absorbent cores of each aforementioned claim (28), wherein said thermoplastic adhesive layer (120) provides with the form of microfibre, and said microfibre has 1 μ m to 100 μ m, the average thickness of preferred 25 μ m to 75 μ m.
6. like the described absorbent cores of each aforementioned claim (28), said absorbent cores also comprises the second auxiliary binder layer on the first surface that is deposited on said basal layer (100).
7. absorbent cores as claimed in claim 6 (28), wherein said first auxiliary binder comprises identical adhesive material with second auxiliary binder.
8. like the described absorbent cores of each aforementioned claim (28), wherein said cover layer (130) is a non-woven webs.
9. like the described absorbent cores of each aforementioned claim (28); Wherein said basal layer (100) is the non-woven webs of carding, air lay or wet-laying, and said non-woven webs comprises the mixture of synthetic fibers or natural fiber or synthetic fibers and natural fiber.
10. like the described absorbent cores of each aforementioned claim (28), wherein said cover layer (130) comprises by weight 50% to 95%, or by weight 60% to 80%, for example 70% cellulose or cellulose-derived fiber by weight.
11. like the described absorbent cores of each aforementioned claim (28), wherein said superabsorbent polymer particles (110) is selected from the neutral Acusol772 Acusol771 of part.
12. like the described absorbent cores of each aforementioned claim (28), said absorbent cores comprise fibrous material superabsorbent polymer particles (110) gross weight less than 40 weight %, preferably less than 20 weight %, be more preferably less than 10 weight %.
13. an absorbability feminine hygiene products, said absorbability feminine hygiene products comprises like the described absorbent cores of each aforementioned claim (28).
14. absorbability feminine hygiene products as claimed in claim 13, wherein said absorbability feminine hygiene products are sanitary towel (20).
15. a method that is used to make absorbent cores said method comprising the steps of
A) cover layer with first surface and second surface is provided, and first auxiliary binder is deposited upon on the said tectal second surface;
The wherein said first auxiliary binder layer deposits to cover less than 50% and greater than 15% with pattern;
B) basal layer with first surface and second surface is provided;
C) the second auxiliary binder layer randomly is provided on the first surface of said basal layer;
D) the superabsorbent polymer particles layer is set on the first surface and the said second optional auxiliary binder layer of said basal layer;
E) thermoplastic adhesive layer is deposited on said superabsorbent polymer particles layer and the said basal layer with the superabsorbent polymer particles layer on the first surface that covers said basal layer;
F) assemble said absorbent cores, make the said first auxiliary binder layer be interposed between said tectal second surface and the said thermoplastic adhesive layer.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP09180425.2A EP2338451B1 (en) | 2009-12-22 | 2009-12-22 | Absorbent core with pattern of adhesive |
| EP09180425.2 | 2009-12-22 | ||
| PCT/US2010/061397 WO2011079086A1 (en) | 2009-12-22 | 2010-12-21 | Absorbent core with pattern of adhesive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102686201A true CN102686201A (en) | 2012-09-19 |
Family
ID=42174036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010800586592A Pending CN102686201A (en) | 2009-12-22 | 2010-12-21 | Absorbent core with pattern of adhesive |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US20110152809A1 (en) |
| EP (1) | EP2338451B1 (en) |
| KR (1) | KR20120084329A (en) |
| CN (1) | CN102686201A (en) |
| BR (1) | BR112012015118A2 (en) |
| MX (1) | MX2012007183A (en) |
| RU (1) | RU2523978C2 (en) |
| WO (1) | WO2011079086A1 (en) |
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| CN102949749A (en) * | 2012-11-28 | 2013-03-06 | 金红叶纸业集团有限公司 | Disposable absorbent product |
| CN106137557A (en) * | 2016-08-22 | 2016-11-23 | 重庆百亚卫生用品股份有限公司 | Absorbent commodity core body and processing technology thereof |
| CN107427400A (en) * | 2015-03-31 | 2017-12-01 | 宝洁公司 | Heterogeneous block comprising foam |
| CN114630643A (en) * | 2019-11-12 | 2022-06-14 | 易希提卫生与保健公司 | Absorbent pad comprising coated superabsorbent particles |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2930984C (en) | 2013-12-20 | 2018-08-07 | The Procter & Gamble Company | Absorbent pads comprising zones of differential absorbent capacity |
| RU2016121702A (en) | 2013-12-20 | 2018-01-25 | Дзе Проктер Энд Гэмбл Компани | Absorbent pads containing zones with different absorbent capacity |
| CN105828763A (en) | 2013-12-20 | 2016-08-03 | 宝洁公司 | Absorbent Pads Comprising Zones Of Differential Absorbent Capacity |
| US10464285B2 (en) * | 2016-01-29 | 2019-11-05 | Panasonic Intellectual Property Management Co., Ltd. | Laminate and manufacturing method thereof |
| KR102507704B1 (en) | 2016-03-31 | 2023-03-09 | 킴벌리-클라크 월드와이드, 인크. | Absorbent cores and methods for forming absorbent cores |
| BR112018068096B1 (en) | 2016-03-31 | 2022-08-16 | Kimberly-Clark Worldwide, Inc | METHOD FOR FORMATION OF AN ABSORBENT CORE |
| WO2017171782A1 (en) | 2016-03-31 | 2017-10-05 | Kimberly-Clark Worldwide, Inc. | Absorbent cores and methods for forming absorbent cores |
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Also Published As
| Publication number | Publication date |
|---|---|
| US20110152809A1 (en) | 2011-06-23 |
| KR20120084329A (en) | 2012-07-27 |
| RU2523978C2 (en) | 2014-07-27 |
| WO2011079086A1 (en) | 2011-06-30 |
| EP2338451B1 (en) | 2022-12-07 |
| BR112012015118A2 (en) | 2016-05-17 |
| EP2338451A1 (en) | 2011-06-29 |
| MX2012007183A (en) | 2012-07-10 |
| RU2012121944A (en) | 2014-01-27 |
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Application publication date: 20120919 |